Neoprene / buoyancy shorts fall under the same USA Triathlon policies as wetsuits. Wetsuits can be worn in water temperatures up to 78 degrees without penalty. If a wetsuit is worn in water temperatures of 78.1 to 84 degrees, the participant becomes ineligible for age group awards, but can still race.For more information go to: https://www.usatriathlon.org/multisport/rules